6063铝合金铸锭_中心裂纹_的成因及对策

6063(,454003):6063,,,:;;;;CausesandCountermeasuresofChevronCrackfor6063AlloylngotSUYa-Jun(Jaozuowanfang(group)co.,ltdJiaozuo45403)Abstract:Thearticleelaboratesonthenegativeinfluenceofthechevroncrackof6063aluminiumalloyingotonthesur2facequalityof6063aluminiumalloyprofile,analysesthefomnationmechanismandeffectsofthechevroncrackandtheproposescountermeasuresKeywords:Chevroncrack;hottear;castingstress;oxidestreak;structuralstreak6063,,,,,,,[1]:::20011103:(1970),,,;;;,,,:,,:,,,:,,,,412002,Vol125,31,,,,,1.1[2](1),,,,:(2),,,,,,,,,,,,,,,1.2[2,3],,,,,,1.2.1:6063,,,,,,,,6063,(MgöSi):0.50%0.65%Mg,0.40%0.50%Si,MgöSi1.41.5,Fe%Si%,A(Al12Fe3Si2),;FeSi%,A(Al12Fe3Si2)B(Al9Fe2Si),B,SiFe6063Fe(Fe0.15%),,Fe,,6063,Fe0.20%0.25%1.2.2,,,(Al2Ti2B,Al2TiRE),,,1.2.3,,;,,,,,,,,,,,,,1ö31ö2,,,2(43)512002,Vol125,3,,,,,,,[1]..,1998(15)2.16063GBöT52372936063,:0.50%0.65%Mg,0.40%0.50%Si,MgöSi=1.21.5,0.20%0.30%Fe,FeöSi1.0,GBöT52372932.2,,,2.3,6063,,,,,,735740,2.4:1822mm,,,,,[1]()1998,9[2].1:,1988[3],.,1990,9:610(22),4,846000t,89193.4(1)919Á556mmÁ424mm900mm,Á556mmÁ424mm1400mm,2.5mmöm,,100%(2),,;(3)12,:Rb=426457MPa,3465MPa;R0.2=406426MPa,6383MPa;D5=17.2%10.0%2%9.2%4(1),,,(2),[1]..:,1985.5.239[2],..:,1989.6.504342002,Vol125,3